Brake



y 0,1935. R. 5. E1566 2,009,723

BRAKE Filed Sept. 29, 1931 I -iu in 9 35 M I L Patented July 30, 1935 i-14 I I Y -BRAKE Cleveland, Ohio, assignor to The Midland Steel ProductsCompany, Cleveland, 7 Ohio; a corporation of Ohio i 1 ApplicationSeptember 29, 1931,,Se1ial No. 565,735

r p I v soiaims; ((31,18S78) p This inventionrelates to brakes'forautomocable adapted to be operated throughthe foot tive vehicles and hasto'do, more particularly, pedal of the automotive vehicle to expand thewith an anti-rattling-device.- I toggle mechanism. M i

. In; certain automotive vehicle brakes of the The toggle mechanismconsists of a male arm 515 internal expanding type, the ends of the shoeare i and a female arm 2, both ofwhich are con separated by means of acable-actuated toggle nected at their inner ends to the toggle pivotmechanism. The ends 01" the toggle are c'o'npin The female arm is.connected to a thrust nected to thrust pins m'ountedat the ends of thepin 3 mounted at one end of the brake shoe and shoe and, when thetoggleis spread, 'the'lateral is provided with a bifurcated portion"which lies m thrust on the shoe istaken through the apron on eitherside of the rollert mounted on the by means of rollers disposed on thethrust pin. thrust pin. The male arm 2 is connected at its it Ordinarilythe -rollersare loosely mounted and free end to the thrust pin '5identical with the there is a marked tendency onthe part of these hrus pn Rollers 9 are mounted n t rollers to rattle when the shoe is in idleorunexthrust pinion either side of the male arm.

panded position. This is extremely noticeable i I-lieretofore, no meanshad been provided, for 3;,

when the vehicle is coasting, and since the adholding these rollers inplace and they may have vent of freewheeling the noise isapt to betended to oscillate along the thrust pin and pro frequent andparticularly annoying. duce objectionable noises when the brake mocha:

It is my intention to obviate this objectionnism was inv idle orinoperative position. When able rattle of the rollers by providingmeansfor the toggle mechanism is expanded the lateral resilientlyholding the rollers in position; thrust on the pins is taken through theapron by It is one object 'ofthisinvention to provide means of therollers which engage therewith, a-spring washer which bears against therollers which engagement of course tends to prevent and preventstherattling thereof. 1, It'isanother rattle thereof; However, ashereinbefore men- 25 object of this invention to prevent the rattlingtioned, when the shoe is at rest the rollers and of such rollers at alltimes; Other objects and toggle links tend to rattle. To overcome thisob- V advantageous features of this inven'tion 'will bejectionableinoise, I have provided the spring n'oted'in the accompanyingdrawing and detailed washers i i, Figs. 1, Zand 3, which are interposeddescription wherein like characters of reference intermediate therollers and the male arm 1. 3o designate like parts. and wherein: Thesespring washers may be stamped out of (3" Figure 1 illustrates anassembly of the brake suitable metal and tempered in concavo-convtexshoe, including a toggle mechanism for eXpandcontour, Fig. l. They areprovided with suitable ing such shoe with my preferred form ofanticentral apertures M to permit mounting thereof rattle-device mountedwith the rollers on the on the thrust pins. When mounted on the thrustrigid side of the shoe; I pin the convex side of the spring washer faces35:

Fi'gureZ is an enlarged view of the endof the the roller. i shoe havingthe rollers and antifrattling washers; The spring washers however, arenot of sulfi- Figure 3 is a plan view of the anti-rattle oient strengthto hinder the free rotation of the Washer; i I rollers when inengagement with the apron A, nor 7 40. Figure 4 is a section taken onthe-line 4-4 interferewith the normal operation of the ex- 40,;

of Fig. 1 a 1 a pending mechanism. They serve to reduce wear Figure 5is' a view showing 'theanti-friction on the'thrust pin and on the malearm byholding device associated with the female toggle arm the rollersfirmly but resiliently in place.

of the spreader mechanism; '--In some instancesit. has been foundthatthe Figu're'fi is a view of a slightly modified form roller '2.willi setup an' objectionable rattle. To 45,

of anti-rattling device. overcome this, the spring washers Ha, which areIn the drawing, I illustrate a well known type identical in everyrespect with the washers H, of brake mechanism wherein I show a brakemay be placed intermediate the bifurcated end apron A adapted to becarried by an axle or of the female toggle arm and the roller 5 Thissteering knuckle of a motor vehicle. The brake roller, however, does notordinarily tend to rattle 50 drum D is of the usual type and is carriedby in certain positions owing to the angular relathe vehicle wheel.Secured to the apron A is tionship that existsbetween the female arm 2and an anchor N against which the ends of the brake thrust pin 4, all ofwhich has been described and shoe S abuts. I provide shoe spreadingmechset out in the claims of my co-pending applicaanism such as a toggleT actuable through a tion, Serial No. 543,312, filed June 10, 1931.v 55

Although I have shown the spring washer as taking the form of anannulus, it will be quite apparent that these washers may be square orrectangular, or may consist of a single strip of material curved in thedirection of its length and apertured for mounting on the thrust pin, asdisclosed in Fig. 5; the reference numeral 20 indicating a squarewasher, and 2| the rectangular or elongated strip curved in thedirection of its length and apertured for mounting on the thrust pin.

While the foregoing sets out a preferred embodiment of my invention itis understood that I am not to be limited in the scope thereof otherthan by the claims appended hereto.

I claim:

1. In a brake shoe having separable ends, thrust pins supported by saidends, rollers mounted on said pins, anti-rattling devices engaging withsaid rollers, and means engaged by said devices and associated with saidpins for expanding said brake shoe.

2. In a brake the combination of shoe parts having separable ends, pinsmounted at the ends of said brake shoe, anti-friction devices mounted onsaid pins, anti-rattling devices engaging said anti-friction devices,and meansfor separating said shoe ends.

3. In a brake, the combination of an apron, a split brake shoe lyingadjacent thereto and being made up of.T-section stock, thrust pinsmounted at the ends of said shoe lying alongside the leg of the T,rollers mounted on said thrust pins for spacing said shoe from saidapron, anti-friction devices mounted on said thrust pins, at least oneof said anti-friction devices having an antirattling device associatedtherewith and toggle mechanism for expanding said brake shoe engagingsaid thrust pins and coacting with said antirattling device.

4. The combination of an apron, a T-section brake shoe having separableends, thrust pins mounted at said ends alongside the leg of the T andhaving rollers disposed thereon below the end of the T for spacing saidshoe from said apron, resilient means mounted on said thrust pins andengaging at least two of said rollers for limiting the axial movementthereof along said thrust pins, and means for expanding said brake shoeconnected to said thrust pins.

5. In a brake, an apron, a brake shoe disposed adjacent thereto, saidbrake shoe carrying a thrust pin having rollers mounted thereon, andanti-rattling devices associated with said rollers and said pin.

6. In a brake, an apron, a drum, a brake shoe disposed adjacent saidapron and having separable ends, and an anchor against which one end ofsaid shoe is adapted to anchor when the drum is rotated in onedirection, and against which the other of said ends is adapted to anchorwhen the brake drum is travelingin a reverse direction, a cable actuatedtoggle for expanding said brake band, thrust pins mounted on said brakeshoe and connected to said tog gle, anti-friction rollers mounted onsaid thrust pins and adapted to transmit the lateral thrust of saidtoggle to said apron, and an anti-rattling device associated with atleast one of said rollers and the part of the toggle adjacent thereto.

'7. The brake shoe comprising a flat curved lining supporting portionhaving an integral radial rib and having separable ends, thrust pinsmounted at the ends of said shoe, a toggle mechanism for separating saidbrake shoe connected to said thrust pins, anti-friction rollers mountedon one of said thrust pins and lying on opposite sides of said togglemechanism and resilient means interposed intermediate said togglemechanism and said anti-friction devices for preventing the rattling ofsaid anti-friction device.

8. In combination, brake shoe means having separable end parts, thrustpins mounted on said end parts, means for separating said end partsconsisting in a toggle having a pair of arms pivotally connectedtogether, each of which engages one of said thrust pins, one of saidarms having rollers mounted on opposite sides thereof and on one of saidthrust pins, and a spring washer mounted between said arm and at leastone of said rollers.

9. In combination, a brake shoe made up of T-section stock and havingseparable ends, means for expanding said shoe which consists in a togglemechanism, means for connecting said toggle to said brake shoe, rollersmounted on said means and resilient means associated with said rollersand reacting between said rollers and at least part of said togglemechanism.

10. In a brake, an apron, a brake shoe disposed adjacent to said apronand having separable ends, a toggle mechanism' for expanding said brakeshoe, thrust pins for connecting said toggle mechanism to said brakeshoe, rollers mounted on said thrust pins and adapted to engage withsaid apron when said shoe is expanded to transmit lateral thrustthereto, and a convex-concavo disc associated with at least one of saidrollers for preventing the rattling thereof when said shoe is in aninoperative position.

11. In a brake, the combination of a brake shoe having a thrust pindisposed adjacent one end thereof, said thrust pin having at least oneanti-friction device mounted thereon, and an anti-rattling deviceassociated with said thrust pin and said anti-friction device.

12. In a brake, a brake shoe, thrust pins supported by the ends of saidbake shoe, rollers mounted on said thrust pins, anti-rattling devicesmounted on said thrust pins and engaging with at least one of saidrollers, said anti-rattling device being resilient and urging saidanti-rattling rollers axially of the pin.

13. In a brake, a brake shoe having separable ends, thrust pinssupported by said ends, expanding means engaged with said pins forexpanding the brake shoe,1and anti-rattling devices engaging said pinsand expanding means.

RUSSELL S. BEGG.

